Machine for shaping uppers over lasts



.Sept. 22, 1942. v a. JORGENSEN 2,295,233

MACHINE FOR SHAPING UPPERS OVER LASTS Filed Sept. 23, 1941 2 Sheets-Sheet 1 p 1942- I B. JORG'ENSEN I 2,296,283

MACHINE FOR SHAPING UPPERS OVER LASTS Filed Sept. 23, 1941 2 Sheets-Sheet 2 Patented Sept.

" usirru STA-r as a j usual-mamas 1 msrs U en- :1, Muriel-eta, e

invention relates to'machmes m use in the manufacture of shoesforshaping uppers over.

lasts, and is herein illustrated as appliedto a pulling-over machine of a well-known type the main characteristic features of which are disclosed in United States Letters Patent No. l,029,-

387, ranted on June 11, 1912, on an application of R. 1". Mcl'ieely's. It is to be understood, however, that in its more general aspects the invention is not limited to machines of that particular It has been proposed heretofore to provide pimautomatically initiated,

mm!! H, J.,-a New Jer musics September 2:, m in. 111305 1 "seem iota-'4) tially and means for series of supplemental pulling impulses which are ited to supplemental through a body 01 fluid as herein illustrated.

* a'nd combinations of -10 .ing-over machines with'means for eifec-ting 'a series of rapidly repeated relative upper-pulling movements of the uppervgrlpp ng means and the v last, since in this manner an upper may be very eifectively stretched and conformed to the contour of the last. he present invention provides novel means particularly well adapted for successful results in such treatment of uppers whatever may be the characteristics of different up- I The above and other features of the invention, 7 I including various novel details of construction 7 7 parts, will now be more parwith reference to the aecom panying drawings and thereafter pointed out in 1 I K ticularly described the claims.

In the drawings,

Fix. 1 is aview'mainly in left-hand side elet tion of the upper portion or a pulling-over machine of the previously mentioned type with the present invention embodied therein:

Fig. 2 isa similar view on a larger scale of aportion of the structure; e

Fig. 3 is mainly a perspective view of the upper-pullingmeans with the'parts in the positions pers. 7 As herein illustrated. the. upp'er-pullingforce thus applied is transmitted through a body of fluid confined in a chamber and preferably noncompressible, the machine having a recip roosting member which sets up in the body ofv fluid a series of rapidly} repeated pressure impulses and havingmechanism movable by the inipulses of the fluid to cited; the pulling of' the upper. In the construction shown this mechanism is arranged to operate grippers which pull the 1 upper. at the opposite sides of the last, but it win he understood thatin its more general aspects the invention. is not limited to gripper-operating i means or to means for pulling an upper in those particularlocations. The invention further provides for progressively increasing the volume of.

the fluid in the above-mentioned chamber, so

that the upper is stretched with progressively increasing force by the impulses of the fluid, and means for-limiting the force of the pull'byilimiting the pressure of the'fluid in the chamber. In

' which they occupy when the upper is being pulled repeatedly bythe side grippers: and

4 is a view partly in left-hand side elevation and partly in vertical section of a portionof the means provided iorpulling the upper repeatedly, with the parts positioned as in Fig. 3.

Like prior machines of the illustratedtype. the

machine herein shown is provided with a toe-end gripper 2 and opposite side grippers 4 (Fig. 3)

which gripand pull anupper over a last respec- .tively atthe end of the toe and-the sides of the forepart, the last being supported against'the'pull of the grippers by a-shoe rest 8 which commonly engages theforepart ofan insole on the last. The side grippers l are connected to gripperoperating levers] which are mounted to swing about'ia fulcrum rod II and to" which upper-pulleing movements are imparted by downward movenient of -a cam-operated slide it. The slide is connected to the levers through rods I4 and springs ll, these springs being yieldable indethe illustrated embodiment of'theinventiongthemeans for thus pulling the pperrepeatedly serves as supplemental upper-pullingmeans', com-'- bin'ed witl'nmeans for first applying to the upper a single continuous pull in a-stage of a cycle of power operations oi-the machine inv the manner,

.characteristic of machines of the type shown in the previously. mentioned Letters Patent, the ac tion of the supplemental, means on the upperbeing automatically initiated near the end ofthat chine of the illustrated type the grippers are oper- "pendently of each other in response to resistance of the upper to the force ofthe. pull applied thereto respectively by the diflerent grippers. .;'Ihe toe-end gripper 2 is operated by mechanism not herein shown'in detail but similar to that provided for operating each side gripper. In a maated to pull the upper in the first stage of a cycle of poweroperations of the machine, whereupon stage of the cycle and continuing thereafter in a pause which occurs in the cycle. -'In the pro-1 vision of means 'for'thus pulling ,the' upper ini the machinecomes automatically toa stop to permit the operator to inspect the upper and to make any necessary adjustment of it relatively to the last during a pause in the cycle. Near the end of thereafter itto'a the invention is not um i upper-pulling means in which the upper-pulling force istransmit'ted operate the heel rest.

this first stage of the cycle a heel rest I8 is moved forwardly into supporting engagement with the heel end of the shoe by mechanism including a cam-operated'slide 20 which, as the parts are viewed in Fig. 1, moves toward the left thus to This slide corresponds to the slide l shownin the previously mentioned Letters Patent. When the machine is' again started a pair of side clamp arms, one of which is shown at 22 in Fig. 1, are swung inwardly into supporting relation to the shoe, and immediately thereafter a front tacker arm 24 and opposite side tacker arms 26 are swung inwardly toward the shoe into positions for driving tacks tofasten the margin of the upper to the insole and last, only one of the side tacker arms 26 being visible in the drawings. In response to the inward movements of the tacker arms the grippers are tripped to cause them to release the upper. The tacker arms carry wipers, one of which is shown at 28 in Fig. 1, for wiping the margin of the upper inwardly over the insole, and are provided also with tack-driving mechanisms which are operated immediately after the arms complete their inward movements. Thereafter the parts of the machine are returned to their starting positions ready for operation on the next shoe.

For purposes of this invention there is mounted on the left-hand side of the machine a casing 30 so formed as to provide a vertical cylinder 32 which are mounted a lower piston 34 and an upper piston 36, the lower piston being somewhat smaller in diameter than the upper piston and being mounted in a diametrically reduced portion of the cylinder. Within the cylinder between the two pistons is a chamber 38 filled with fluid which is preferably a noncompressible liquid such as light oil. The casing 36 further serves to provide, outside of the cylinder 32, a reservoir 40 for oil under atmospheric pressure, the level of the upper surface of th 011' being above the piston 36. This piston is connected by a pin 42 to an arm 44 fast on a rockshaft 46 mounted in bearings in the casing 30, the arm being located within the reservoir 40. The pin 42 extends through a slot 48 formed in a lug 50 on the piston 36 to permit th necessary play in the movements of the piston. Also fast on the rockshaft 46 outside of the casing 30 is an arm 52 connected by a link 54 to an arm 56 fast Fast on the shaft 58 is operating levers 8 and connected to these levers by yoke members 64 which extend over the upper face of the member 62 and over the lower faces of the levers 8. The member 62 is proinitial upper-pulling movement of the side grippers and for controlling them manually, as disclosed in Letters Patent No. 1,169,414, granted.

on January 25, 1916, on an application of R. F. McFeely's. In the construction herein shown the retarding meansand the provision for such manual control are omitted as unnecessary, as more fully hereinafter explained.

Rapidly repeated supplemental upper-pulling movements are imparted to the side grippers 4 by movements of the piston 36 in the pause which occurs in the cycle of operations after the initial pulling of the upper. For thus operating the piston 36 a series of pressur impulses are set up in th fluid in the chamber 38 by rapid reciprocating movements of the piston y 34. This piston is connected by a pitman 68 to a crank pin I0 formed eccentrically on a shaft 12 mounted in a bearing on the head -of the machine, and fast on the shaft i a pulley 14 connected by a belt 16 to a continuously driven pulley (not shown) operated by the power-drivvalve 80 is provided with a stem 82 movable in a bushing 84 which is threaded in the casing 30. Supported on an extension of the bushing 84 is a bracket 86, and mounted in this bracket between an adjusting screw 88 and a plunger 90 which engages the outer end of th valve stem 82 is a compression spring 92 which acts through the plunger on thevalve stem and tends to move the valve toward a valve seat 94 on the cylinder 32 and thus to close the passageway 18. Threaded on the outer end of the valve stem 82 is a spool 96 between two flanges 98 and I00 of which is the forked lower end of a valve-controlling lever I02 hereinafter referred to; To hold the valve 80 initially in position to permit free passage of the fluid between the' chamber 38 and the reservoir 40 as above described, there is provided a lever I08 pivotally mounted at I06 (Fig. l) on a bracket I708 on the head of the machine and having a hooked end v H0 arranged to engage the flange I00 of the spool 96 as illustrated in Fig. -1. The lever I04 is held in this valve-controlling position by aspring .I I2 which tends to swing it upwardly. To render the fluid in the chamber 38 eiiective to V operate the piston 36, the valve 86 is released vided with a stem 66 mounted to turn in the piston 36 upper-pulling movements may be imparted to the levers. The rockshaft 58 and the connections between it and the gripper-operating levers 8 are substantially identical with portions of mechanism heretofore provided in machines of the illustrated type for retarding the by downward movement of the lever I06. For. this purpose there is fast on the previously mentioned slide 20 an arm H4 provided with a pin H6 arranged to engage'an inclined face H8 on the lever I04. When the slide 20 is operated to move the heel rest 18 forwardly into engagethe pin H6 by engagement with the inclined face H8 swings the lever I04 downwardly to release the valve which is then moved by the 1 spring 92 to close the passageway 18 and thereby to initiate the series'of rapidly repeated supplemental upper-pulling movements of the side grippers.

It will be evident that the upper-pulling movements are imparted to the side grippers by upi of the spring 02.

- movement, were to move downwardly the'same distance in response to a corresponding upper by the grippers. It will be understood that the piston 38 is hot moved downwardly to that extent by the elasticityot theupper, since the upper is stretched more or less by each pull applied thereto and the springs I6 bytheir action nthe levers I tend to'prevent retractive movements of the grippers. In order, therefore,

to overcome the tendency io fgthe piston IE to be moved downwardly in res to the. downward movements of the piston 34, provision-is aflorded .ior the admission oiadditionalfluid to the chamber 3| from the reservoir 4' in response to the downward movements of the piston 34. For this purpose the pistonitis provided witha passageway I20 controlled by a check valve I22 which is I normally held closed by a spring I24, this spring being mounted between the valve'and a nipple 124 which is threaded in,the piston and provided with a passageway I28. vAce dingly,

downward movements oi the piston 34 serve to draw fluid past the valve I22 through the passageways I20 and I28 and thus to increase the volume of the fluid in the chamber' as the upper is pulled progressively by the side grippers.

-It will be evident that as the volume of the fluid thus'in reases the upper is pulled with increasing to e by the upward movementsof the piston 38 by reason of the increasing resistance ,which it ofl'ers to the movements of the grippers. Be-

1 tore the pull on the upper becomes excessive the valve 40 isriorced away from its seat against the resistance of the spring 92 by' the pressure of the fluid in the chamber 38, thus limiting the force or the pull applied to the upper. It will be a understood that thereafter the valve is forced. away from its seat in response to each upward movement of the piston 34, so that the fluid adfmitted to the chamber 34in response to the downward movements of thigpiston is returned to the reservoir 40 without any substantial further increase in the force of the pull on-the upper. The maximum force oi the pull may be varied by turning the adjusting screw to vary the stress The action or the. supplemental gripper-operating means is terminated shortly after the beginning of the ilnal stage of the cycle of opera- ".tions of the machine by moving the valve Oil away from its seat '94 to provide ,free passage for Qthe fluid between the-chamber 38 and the reser- "voir 40.. This movement ofthe valve is'efl'ected' through the previously mentioned lever In! "Which-8.5 shown in Fig. l, is pivotally mounted substantialiylmidway between its opposite ends on-a lug III formed on the casing 30, Pivotally connected to" the upper end of the lever is one end of a rod III the other endof which to embrace a boss I34 (Fig.

chine'oi the illustrated typeis provided for imparting inward swinging movements to the tacker arms fland 28' and for actuating the tack-driving mechanisms. The position of the cam relatively to the rocks'haft'is determined by a dowel pin I42. The boss I34 is provided with a flange a, v 3 g 2,290,288 ward movementsot the piston 84 in response downward I r movement of the piston, substantially no useiul result would be obtained in thepulling of the I44 for engaging one side of the forked portion a or the rod is: to assist in-maintain ns the rod in its proper position. The cam I38 is provided with a depression I46 which in'the'flrst stage of 5' the cycle or operations is in position to receive a '7 roll I4lcarried by the rod I32, so that the valve "when it is released by the! lever I04 may be moved to its closed position by the spring I2. 'As soon as the rockshaft I 40 begins to turn to 1 impart the inward swinging-movements to the tacker arms the cam I34 acts swing the lever I02 in a counterclockwise direction (Fig.1) and thus to move the valve Oil to open position. The valve is maintained by the i cam in this position until the lever lli4 is swung upwardly by the spring III in response to return movement or theslide near the end of the .cycle, so that the hooked end IIO of-the lever V will hold the valve open when the'depression I46 20 oi the cam returns to a position opposite the Fig. 2.

The manner 01' operation or the machine, in so far as it is or interest with reierenc'e tq the-pres- 5 .ent invention, will now be briefly summarizii. It will be understood that the piston 34 is at times rapidly reciprocated by'its operating means, but that prior to the operation or the machine on a shoe this is without any efl'ect on the side grippers, since the valve N is held in open positionby the lever m and the fluid, therefore, flows idlythrough the passageway the chamber 38 and the reservoir 40.

ments or the since the crank pin I0 is but little displaced from the of the shaft 12, as shown in Fig. 1. After presenting a shoe to the machinewith'the margin of the upper between the jaws of the several grippers, the operator starts the machine, whereupon'the grippers are closed and are. op-

' erated to pull the upper in the first stage or the cycle, the machine thereafter coming to a stop The movesion. The side grippers 4 are thus operated 4r yieldingly through'the springs it which, in view of the means provided by this invention for J thereafter further. operating the side grippers, 7 may be lighter springs than commonly used heretoi'ore in machines or the illustrated type. Since 50 the-upper is thus subjected by the side grippers to a comparatively-iightfpull in the first stage or! the cycleythe means previously referred to as commonlyu'sed heretofore for retarding the upper-pulling movements of the side grippers 5.3 and for Nearthe end of the first stage of the cycle the heel rat; is is moved forwardly into engagement with the-'shoeby theslide 20, and by this movement of the-slide the lover I 04 is swung downwardly to releasethe valve it tovbe closed by the spring. As the valve is-thus closed thei-oll I48 (Fig. 2). is moved by lever Ill and the rod I32 into the depression 148 of the cam I" on' the rockshaft I40. Since the closing of the valve 80 terminates thefree flowoi fluid through the passageway I8 resulting from the movements '0! the piston (the piston thereafter in its upward movements sets up pres- 70. sure impulses in the fluid in the chamber 38 and acts thus through the fluid to impart upward movements to the piston 38 and thereby to impart further upper-pulling movements to the grippers 4. Since the upperis stretched more or roll I48 at the end" or the ,cycle, as shown inwith the gripper holding the upper under ten controlling them, manually is rendered unnecessary and is accordingly dispensed with.

on the roll I 48 to all piston are ,very short movements,

and thus to permit less by these movements the grippers and since the springs l6 tend to prevent reverse movements of the g ippers by the elasticity of the upper, the downwa d movements of the piston 34 serve to draw additional fluid from the reservoir 40 into the chamber 88 past the check valve I22.

The-

volume 01 the fluid in the chamber 3815 thus progressively increased, so that the upper is stretched with progressively increasing iorce by the impulses of the fluid in the chamber 38 as grippers having thus been reached, the-valve 80 is thereafter forced off its seat by each upward movement of the piston 34, so that the upper is not subjected to any substantial further pullbut is nevertheless maintained under the desired tension. x

It will be understood that the above-described supplemental upper-pulling movements of the side grippers, which are initiated substantially at the end of the first stage of the cycle of operations of the machine, take place mainly during of fluid a series of automatically repeated pressure impulses, and mechanism movable by the impulses thus set up in the =fluid to effect a series of relative upper-pulling movements or said upper-gripping means and the last.

3. In a machine for shaping uppers over lasts, means for gripping the margin of an upper ofi a last, a fluid-containing cylinder, a piston in said cylinder, means for reciprocating said piston to set up in the fluid a series of automatically repeated pressure impulses, another piston in said cylinder movable by the impulses of said fluid,

l and mechanism for eflecting by the movements the pause in the cycle when. the machine is other- 1 wise idle and when the operator is permitted to inspect the upper and ii necessary to adJust it relatively to the last. After the machine has again been started and the side clamp arms 22 have been swung inwardly into positions to control the shoe, the rockshaft H0 is turned to swing the tacker arms 24, 26 inwandlytoward the shoe and then to actuate the tack-driving mecha nisms, the several grippers being tripped to cause them to release the upper as the tacker arms are thus swung inwardly, as disclosed in Letters Patent No. 1.029387. In response to this movement of the rockshait I40 the cam i 38 acts through the rod H2 and the lever M2 to move the valve 38 to its open position, thus again permitting a free flow of fluid through the passageway 18 and rendering the fluid ineffective on the piston 36 notwithstanding the continued movements of the piston 38. When the slide it receives its return movement near the end of the cycle, the lever IM is swung upwardly by the spring H2 into position again to engage the flange Hi8 and thus to maintain the valves in its open position after the rockshaft 8 has returned the cam I36 to the initial position in which it is shown in Fig. 2.

Having described the invention, what I claim as new and desire to secure by etters Patent of the United States is:

1. In a machine for shaping uppers over lasts, means for gripping the margin of an upper on a last, a device having a body of fluid therein, means for setting up in said body of fluid a series of automatically repeated pressure impulses, and mechanism for effecting a series of relative movements of said upper-grippingmeans and the last to pull the upper in response to the impulses thus set up in the fluid.

2. In a machine for shaping uppers over las means for gripping the margin of an upper on a last, a device provided with a chamber having a body of fluid therein, a member arranged to act on the fluid in said chamber, means for reof said other piston a series of relative upperpulling movements of said upper-gripping means and the last.

a. In a machine for shaping uppers over lasts, means for gripping the margin of an upper on a last, a device provided with a chamber having a body of fluid therein, a member arranged to act on the fluid in said chamber, means for reciprocating said member to set up in said body of fluid a series of automatically repeated pressure impulses, another member movable by the impulses ofisaid fluid, mechanism ifor eflecting by the movements of said other member a series of relative upper-pulling movements of said upper-gripping means and the last, and spring means tending to prevent reverse relative movements of said upper-gripping means and the last during the movements of said first-named member in one direction.

5. In a machine ion shaping uppers'over lasts, grippers arranged to grip the-margin of an upper on a last at the opposite sides of the last respectively, a device provided with a chamber having a body of' fluid therein, a member arranged to act on the fluid in said chamber, means for operating said member to set upin said body of fluid a series or automatically repeated pres-, sure impulses, another member movable by the impulses of said fluid, and mechanism for imparting to said grippers by the movements of said other member a series of movements to pull the upper over the last.

5. In a machine for shaping uppers over lasts, grippers arranged to grip the margin of an upper on a last at the opposite sides of the last respectively, a device provided with a chamber having a body of fluid therein, a member arranged to act on the fluid in said chamber, means for reciprocating said member to set upin said body of fluid a series of automatically repeated pressure impulses, another member movable by the impulses of said fluid, mechanism for imparting to said grippers by the movements of said other member a series of movements to pull the upper over the last, and springs associated respectively with said difl'erent grippers and tending to prevent reverse movements thereof during the movements of said first-named member in one direction.

'7. In a machine for shaping uppers over lasts, grippers arranged to grip the margin of an upper on a last at the opposite sides of the last respectively, a fluid-containing cylinder, a piston in said cylinder, means for reciprocating said piston to set up in the fluid a series of ahitomatically repeated pressure impulses, another piston in said cylinder movable by the impulses of said .fluid, and mechanism for imparting to said gripp rs by the movements of said other piston a series of movements to pull the upper over the last.

ciprocating said member to set up in said body 7 8. In a machine for shaping uppers over lasts,

sure impulses, mechanism .a series or automatically progressively increasing force,

the force thus applied assumes means tor gripping the margin of an upper on a last, a device provided with a chamber having a last to pull the upper with progressively increasmg force as the volume of the fluid in said chamber increases. v I

9. In a machine for shaping uppers over lasts,

' the volume 01' the fluid means for gripping the. margin of an upper on a last, a device provided with a chamber havinm body or fluid thereinfa member arranged to act,

on the fluid-in said, chamber, means for reclprocating said member to setup in said body of fluid a series of automatically repeated pres- :member movable by the impulses of said fluid to eiiect a series of relative upper-pulling movements of said upperripping means and the last,

and means for admitting additional fluid to said chamber in response to movements of said flrstnamed member in one direction to increase progressively the volume of the fluid in the chamber as the upper is stretched by the series of pulls applied thereto.

'10. In a machineior shaping uppers over lasts,

means for gripping the margin of an upper ona last, a device provided with a chamber having a body or fluid therein, a member arranged to act on the fluid in saidchamber', means for reciprocating said member to set up in said body 01 fluid repeatd pressure impulses, mechanismincludi g another member 1 movable by the impulses 0 said fluid to eflect a series or relative upper-pulling movements'oi' including another 20 13. In a machine for shapinguppers over lasts, means for gripping the margin of an upper on a last, a device provided with a chamber having a body of fluid therein, means for setting up in said body of fluidca series or automatically repeated pressure impulses while progressively increasing in said chamber, mechanism arranged to be operated bythe impulses of r said fluid to eflect a series, 01 relative movements 01 said upper-gripping means and the last to pull the upper with progressively increasing force as the volume of the fluid in said chamber increases, and spring-controlled. valve means arranged to provide anoutlet for the-fluid from said chamber to limit the force thus app ied to the upper.

14. Ina machine for shaping uppers over lasts, means ior gripping the margin 01 an upper on a last, a device. provided with a chamber having a body of fluid therein, a member arranged to act' on the fluid in said ch eating said member to se up in said body oifluid a series oi automatically repeated pressure impulses, another member movable by the impulses of said fluid, mechanism for eiiecting by the 5 movements or said other member a series of rela-- additional fluid,

tive upper-pulling movements or said uppergriping means and the last, valve means for admitting mgvements of said first-named member in one dire tion to increase progressively the volume of the fluid in the chamber and thus to increase the means for gripping the said upper-gripping means and the last, a fluid 40 reservoir, and a check'valve arranged to open to admit additional fluid from the reservoir to said eating said member to set up chamber in response to movements of said flrstnamed member in one direction to increase progressively the volume of the fluid in said chamber as the upper is stretched by applied thereto.

11. In a machine for shaping uppers overlasts, means for gripping the-margin or an upper on a the "series of pulls .valve arranged to open force of the-pullapplied to the upper, and addiber, means ror-reciproto said chamber in response to 'tiunal spring-controlled valve means arranged to provide an outlet tor the fluid from said chamber to limit the pressure of the fluid and thereby to limit the force of the pull on the upper.

15. In a machine for shaping uppers over lasts, margin 01. an upper on a last, a device .provided with a chamber havlng a, body of fluid therein, a member arranged to act on the fluid in said chamberymeans for reciproin said body 01' fluid a series or automatically repeated'pressure impu s s. 0! said fluid, mechanism for eflecting by the movements of said other member a series of rela.-' tive upper-pulling movements oi! said upper-gripping means and the last, a fluid reservoinga check to admit additional fluid last, a device provided with a chamber having: a i'rom the reservoii to said chamber in response to body of fluid therein, means for setting up in said body of fluid a series of automatically repeated pressure impulses, mechanism arranged to be operated by the impulses of said fluid toefl'ect a series- 01' relative movements of said upper-gripping means and the last't pull the upper with g and means for automatically limiting the force thus applied to thelipper. A

v 12. In a machine for shaping uppers over lasts,

' means for gripping the margin oi an upper on a last, a device provided with' a chamber having a in said chamber, mechf body of fluid therein, means for settin'g'up insaid 1 O series 01- relative move-- the fluid in said chamber other member regardless 01 said first-named member,

movements of said flrst 'named member in one dianother member movable by the impulses re'ctibn toincrease progressively the volume or the fluid in said chamber and thus .tqincrease the iorce of the pull applied to' the upper, and-a spring-controlled valve movable to permit return 01' fluid from the chamber to saidresenvolr to 16. In a machine for shaping uppers over lasts, means for gripping themargin of an upper on a last, .a device provided with a chamber -having a body of fluid therein, a member arranged to act on the fluid in said chamber, means for recipro- I eating said member to set up in said body of fluid a series of. automatically repeated pressure inipulses, another member movable by the impulses of said fluid',--mechanism ping means and the last, means sageway i'or flow 01' the fluid chamber to render the fl providing a pasr ineflective on sa'id the movements or and means for initilimit the pressure of the fluid in the chamber and thereby to limit-thetorc'e oi theipull on the vupper.

for eflecting by the movements of said other member a series 0! rela'-' tive upper-pulling movements of. said upper-gripinto andout 01' said ating ,the operative movements of said other member by obstructing the flow oi fluid in said passageway. J 4

1'7. In a machine for shapingup'pers over lasts, means for gripping the margin of an upper on a last, a device provided with a chamber having a bodyof fluid therein, a member arranged to voir, means providing a passageway for flow of thefluid between'said chamber and reservoir to render the fluid ineffective on said other member regardless of the movements of said firstnamed member, a valve movable into position to obstruct the flow of fluid in said passageway and thus to render the fluid effective on said other member, a spring for thus moving the valve, and means for holding the valve initially retracted against the resistance of said spring and for releasing it to the action of the spring. 3

18. In a machine for shaping uppers over lasts, means for gripping the margin of an upper on a last, operating means for eflecting relative movement of said upper-gripping means and the last to, pull the upper in a stage of a cycle of power operations of the machine and for then holding the upper under tension during a pause in the cycle, supplemental operating means for eifectirfg automatically in said pause in the cycle a series of relative movements of said uppergripping means and the last further to pull the upper, and automatic means for initiating the ating means.

19. In a machine for shaping uppers over lasts,

upper-pulling action of said supplemental opermeans for gripping the margin of an upper on a last, operating means for efiecting relative movement of said upper-gripping means and the last to pull the upper in a stage of a cycle of power operations of the machine and for then holding the upper under tension during a pause in the cycle, supplemental perating means for efiecting automatically in said pause in the cycle a series of relative movements of said upper-gripping means and the last further to pull the upper,

on a last at the opposite sides of the last respectively, operating'means for moving said grippers to pull the upper in a stage of a cycle of power operations of the machine and for then maintaining them in positions to hold the upper under tension during a pause in the cycle, supplemental 'operating means for imparting to said grippers automatically in said pause in the cycle.

a series of additional upper-pulling movements,

and automatic means for initiating the action of said supplemental operating means on the grippers in said upper-pulling stage of the cycle.

21. In a machine for shaping uppers over lasts, means for gripping the margin of an upper on a last, operating means for effecting relative movement of said upper-gripping means and the last to pull the upper in a. stage of a cycle of power operations of the machine and for then holding the upper under tension during a pause in the cycle, a device having a body of fluid therein, means for setting up in said body of fluid a series of automatically repeated pressure impulses, and mechanism for efiecting in said pause in the cycle a series of relative movements .of said upper-gripping means and the last further to pull the upper in response to the impulses thus set up in the fluid.

22. In a machine for shaping uppers over lasts, means for grippingthe margin of an upper on a last, operating means for effecting relative movement of said upper-gripping means and the last to pull the upper in a stage of a cycle of power operations of the machine and for then holding the upper under tension during a pause in the cycle, a device provided with a chamber having a body of fluid therein, a member arranged to act on the fluid in said chamber, means for reciprocating said member to set up in said body of fluid a series of automaticalLv repeated pressure impulses, mechanism movable by the impulses thus set up in the fluid to effect in said pause in the cycle a series of relative movements of said upper-gripping means and the last further to pull the upper, and automatic means for initiating the upper-pulling action of the fluid on said mechanism in said upper-pulling stage of the cycle.

' 23. In a machine ,for shaping uppers over lasts, means for gripping the margin of an upper on a last, operating means for eflecting relative move ment of said upper-gripping means and the last to pull the upper in a stage of a cycle of power operations of the machine and for then holding the upper under tension during a pause in the cycle, a device provided with a chamber having a body of fluid therein, a. member arranged to act on the fluid in said chamber, means for reciprocating said member to set up in said body of fluid a series of automatically repeated pressure impulses, mechanism including another member movable by theiznpulses thus set up in the fluid to eifect in said pause in the cycle a series oi. relative movements of said upper-gripping means and the last further to pull the upper, means providing a passageway for flow of the fluid into and out of said chamber to render the fluid ineflectiveion said other member regardless of the movements of said first-named member, a valve movable into position to obstruct the flow of \the fluid in said passageway and thus to render the fluid eflective on said other member, and automatic means for thus moving said valve in said upper-pulling stage of the cycle,

IBERN'H ARDI. J ORGENSEN. 

